<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>测试打印</title>
    <style>
        .header,
        .box {
            width: 100%;
            height: 100px;
            background-color: blue;
            text-align: center;
            line-height: 100px;
            color: #fff;
            font-size: 50px;
        }

        .header {
            position: fixed;
            top: 0px;
            left: 0;
            background-color: #f00;
        }

        .box {
            height: 300px;
            margin: 30px 0;
            line-height: 300px;
        }

        .container{
            /* backdrop-filter: blur(10px); */
            filter: blur(3px);
        }

    </style>
</head>

<body>
    <div class="box">内容</div>
    <div class="container">
        <div class="header">头部</div>
        <div class="box">1</div>
        <div class="box">2</div>
        <div class="box">3</div>
        <div class="box">4</div>
        <div class="box">5</div>
        <div class="box">6</div>
        <div class="box">7</div>
        <div class="box">8</div>
        <div class="box">9</div>
        <div class="box">10</div>
        <div class="box">11</div>
        <div class="box">12</div>
        <div class="box">13</div>

    </div>
</body>

</html>